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Plant root cells

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Plant root cells

Postby gizmogirl1993 » Sun Feb 28, 2010 11:05 am

i need help on my science homework because im stuck on 2 questions

1. suggest why giving roots plenty of oxygen affects the uptake of sulfate ions

2. explain why over-watering pot plants can kill them and why very few different species of plants can grow in marshes

ill be grateful for any help

*i've got a table which shows that with barley seedlings, when put in cuture solutions. container 1 had oxygen bubbled through and container 2 had nitrogen bubbled through. the page says that nitrogen gas is very inert. the results show that container 1 was considerably higher than container 2 by an average differnce of 178 of sulfate ions absorbed by the plant
Last edited by gizmogirl1993 on Sun Feb 28, 2010 1:44 pm, edited 1 time in total.
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Postby JackBean » Sun Feb 28, 2010 11:53 am

I guess, because the incorporation is reductive, thus oxygen will deplenish reductive potential (glutathion, redoxin etc.), but I didn't find anything like transport inhibition or sensitivity to oxygen like with nitrogen fixation...
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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Re: Plant root cells

Postby mamoru » Sun Feb 28, 2010 12:24 pm

gizmogirl1993 wrote:i need help on my science homework because im stuck on 2 questions

1. suggest why giving roots planty of oxygen affects the uptake of sulfate ions

2. explain why over-watering pot plants can kill them and why very few different species of plants can grow in marshes

ill be grateful for any help

1. I actually don't know, so if you find out, please share. :)

2.) Do you know how plant roots absorb water? If not, look it up (hint: it involves active transport, but NOT of water), and then think about what would happen if the "solution" around the roots were to be over-dilute. Sorry to not give a direct answer, but I wouldn't want to deny you the thrill of figuring it out. ;)

If you still have trouble, post what you find about how roots absorb water and anything that confuses you, and we'll take it from there. :)
"Empathise with stupidity, and you're halfway to thinking like an idiot." - Iain M. Banks
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Postby jwalin » Sun Feb 28, 2010 2:38 pm

ain't too sure but here's what i think


1.see the take up of ions requires energy therrefore to drive it you need active transport and oxygen. so...

2. should i help
okay
its related to osmosis
it isn't what you do that matters but it is how you do it
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Postby JackBean » Sun Feb 28, 2010 2:56 pm

so, you have higher uptake with oxygen, right?
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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Postby jwalin » Tue Mar 02, 2010 11:34 am

yes
thats what i have learnt till now
it isn't what you do that matters but it is how you do it
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